Lucie (Carole Laure), the Canadian, and Nicole (Miou-Miou), the French, are two inseparable friends who share an old house in Montreal. One works for the radio, the other for an airline. Their respective lovers, Julien and Robert, both married, leave them regularly to find their respective families. Hence a feeling of frustration that they would like to no longer know and which pushes them to dream of the ideal man, that is to say available, therefore single. The two lovers having finally opted for family life, the young women remit their misfortune when Lucie meets Arnold (Claude Brasseur), a character with mysterious activities but funny, endearing, tender and unpredictable. Lucie promises to keep him near her. Nicole, she believes she has definitely found the man of her dreams in the person of Jack, a handsome, serious, charming American doctor and, above all, not married. Nicole, a little sad to leave Lucie, leaves with him for Florida. Unfortunately, for both of them, disillusionment will be at the end of each of their roads. Routes that will bring them back to their starting point and their friendship.